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How Much Radiation is Emitted by Popular Smartphones?



Infographic showing the Radiation emissions of popular smartphones

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Radiation Emissions of Popular Smartphones

Smartphones have become an integral part of our everyday lives. From work and school to daily tasks, these handheld devices have brought everything into the palm of our hands.

Most people spend 5-6 hours on their phones each day. And, given that our phones emit a tiny amount of radiation, we’re exposing ourselves to radiation for hours each day.

But different phones emit different amounts of radiation.

With the help of data collected by the German Federal Office of Radiation Protection, we visualize the radiation emissions of some popular smartphones in the market today.

Radiation and SAR Values of Smartphones

Smartphones and other mobile devices emit tiny amounts of radiofrequency (RF) radiation. Humans can absorb this radiation when the smartphone is being used or is lying dormant anywhere near their bodies.

The parameter used to measure phone radiation emissions is the Specific Absorption Rate (SAR). It is the unit of measurement that represents the quantity of electromagnetic energy absorbed by the body when using a mobile device.

The Council of the European Union has set radiation standards for cell phones at 2 watts per kilogram, measured over the 10 grams of tissue that is absorbing the most signal.

SAR values are calculated at the ear (speaking on the phone) and at the body (kept in your pocket). For the purposes of this article, we’ve used the former calculations.

Smartphones With the Highest Levels of Radiation Emissions

The Motorola Edge has the highest radiation emission with a SAR value of 1.79 watts of radiation per kilogram. That’s significantly higher than most other smartphone models in the market today and close to the limits set by the EU for cellphones.

Coming in second is the Axon 11 5G by ZTE with 1.59, followed by the OnePlus 6T at a close third with 1.55 W/kg. The Sony Experia AX2 Plus with 1.41 and the Google Pixel 3 XL and 3A XL at 1.39 round out the top five.

Here is a look at the 10 smartphones that emit the highest level of radiation:

Smartphones with the lowest level of radiation

Now that we have detailed the worst offenders let’s look at the smartphones with the lowest levels of radiation emissions.

Smartphones With the Lowest Levels of Radiation Emissions

The smartphone with the lowest SAR value is the ZTE Blade V10, with 0.13 watts of radiation per kilogram.

Mobile devices by Samsung carry some of the least radiation risks. The company has four phones considered to be the best in the category. The Galaxy Note 10+ is the best model in their line-up, emitting a meager 0.19 watts per kilogram.

Here is a look at the 10 smartphones that emit the lowest levels of radiation:

Smartphones with the highest level of radiation

There is currently no significant research proving the harmful effects of phone radiation.

Despite this, people who are in contact with their devices for extended periods can at least quantify their radiation exposure and make choices about which brands serve their needs.

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Ranked: The Top Startup Cities Around the World

Here are the global startup ecosystem rankings, highlighting the scale and maturity of major tech hubs worldwide.



This bar chart shows the top startup ecosystems in the world in 2024.

The Top Startup Cities Around the World

This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.

A richly connected network of founders, venture capital firms, and tech talent are some of the key ingredients driving a startup ecosystem.

As engines of growth, these tech clusters are evolving on a global scale. While the world’s leading startup cities are concentrated in America, several ecosystems, such as Beijing and Seoul, are growing in prominence as countries focus on technological advancement to spur innovation.

This graphic shows the best startup cities worldwide, based on data from Pitchbook.

The Global Startup Ecosystem Rankings

To determine the rankings, each city was analyzed based on the scale and maturity of their startup ecosystem over a six-year period ending in the second quarter of 2023.

Among the inputs analyzed and used to calculate the overall development score were fundraising activity, venture capital deals, and exit value:

RankCityDevelopment ScoreCapital RaisedDeal CountExit Value
1🇺🇸 San Francisco90$427.6B19,898$766.3B
2🇺🇸 New York76$179.9B13,594$171.7B
3🇨🇳 Beijing76$161.2B8,835$279.2B
4🇨🇳 Shanghai73$130.3B7,422$186.8B
5🇺🇸 Los Angeles71$144.6B9,781$181.4B
6🇺🇸 Boston70$117.0B6,044$172.8B
7🇬🇧 London64$99.0B11,533$71.9B
8🇨🇳 Shenzhen63$46.4B5,020$66.3B
9🇰🇷 Seoul61$31.1B6,196$71.0B
10🇯🇵 Tokyo60$26.2B5,590$28.0B
11🇨🇳 Hangzhou59$50.7B3,361$88.7B
12🇺🇸 Washington D.C.55$43.7B2,706$28.2B
13🇺🇸 Seattle54$31.7B2,693$35.6B
14🇸🇬 Singapore52$45.7B4,507$38.0B
15🇺🇸 San Diego52$33.5B2,023$44.7B
16🇺🇸 Austin52$26.4B2,636$22.9B
17🇨🇳 Guangzhou52$24.7B1,700$24.0B
18🇮🇱 Tel Aviv51$21.0B1,936$32.2B
19🇺🇸 Denver51$26.8B2,489$29.9B
20🇩🇪 Berlin50$31.2B2,469$15.9B

San Francisco dominates the pack, with $427.6 billion in capital raised over the six-year period.

Despite a challenging funding environment, nearly 20,000 deals closed, highlighting its outsized role in launching tech startups. Both OpenAI and rival Anthropic are headquartered in the city, thanks to its broad pool of tech talent and venture capital firms. Overall, 11,812 startups were based in the San Francisco Bay Area in 2023, equal to about 20% of startups in America.

Falling next in line is New York City, which raised $179.9 billion over the same time period. Crypto firm Gemini and machine learning company, Hugging Face, are two examples of startups based in the city.

As the top-ranking hub outside of America, Beijing is home to TikTok’s parent company, ByteDance, which is one of the most valuable private companies in the world.

In recent years, much of the startup funding in China is being driven by government-backed funds. In particular, these funds are focusing heavily on “hard tech” such as semiconductor-makers and electric vehicle companies that align with the government’s strategic long-term goals.

Another leading tech hub, Singapore, has the highest venture capital funding per capita worldwide. In 2023, this was equal to an impressive $1,060 in venture funding per person. By comparison, venture funding was $345 per person in the U.S., the second-highest globally.

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